iiii iiis iiit iisi iist iitt ilis ilit ill- illi ills illt ilts isil isis isit isls issi isss isti ists itil itis itll itsi liii liis lili lill lils lilt lisi liss list liti litl lits litt llll lsts ltsi s-ii siit sil- sili sill sils silt sisi siss sist sit- siti sits sitt sl-i slit slst slts ssis ssit sslt sssi ssss sstl ssts stil stis stit stlt stsi stss tiit till tils tilt tisi tiss tist titi tits titt tlli tsis tssi tsst tsts ttss tttt